What is Lotrafilcon A?

Lotrafilcon A was introduced in 2001 and had the highest oxygen permeability of any of the commercially available silicone hydrogel contact lenses. The popularity of silicone hydrogels has steadily increased since their introduction, and they now account for more than 50% of the soft contact lens market in the USA.

Is Lotrafilcon B silicone hydrogel?

Two commonly used BCLs are Lotrafilcon B and Balafilcon A. These silicone hydrogel contact lenses have been approved by Food & Drug Administration (FDA) for continuous wear after refractive surgery (6 days and 30 days for Lotrafilcon B and Balafilcon A lenses, respectively) [14], [18].

What does Balafilcon a mean?

Balafilcon A is a homogeneous combination of a TRIS monomer derivative that’s copolymerized with the hydrophilic hydrogel monomer N-vinyl pyrrolidone (NVP). The molecular strategy with this combination is the synthesis of a TRIS-like structure with polar groups to make it hydrophilic.

What is silicone hydrogel made of?

The silicone hydrogels are made of high oxygen permeable poly(dimethyl siloxane) (PDMS)-based macromers combined with various hydrophilic monomers to improve the rubbery characteristic and to increase the surface hydrophilicity of silicone.

What does Samfilcon a mean?

According to the manufacturer, samfilcon A is a combination of three distinct types of silicone that contribute to the balance of high oxygen transmissibility and low modulus. The lens material undergoes two distinct polymerization phases.

Is higher water content in contact lenses better?

The water content of a contact lens means precisely that – how much of the contact lens is made up of water. This figure is always given as a percentage. The higher the water content in a contact lens, the more oxygen reaches the cornea during lens wear. This is important for healthy eyes.

What type of lens do most eye doctors recommend monthly?

Silicone hydrogel is an advanced material that allows up to five times more oxygen to reach the cornea, keeping the eyes healthy and comfy for longer. This makes silicone hydrogel an excellent fit for longer wear lenses, like monthlies or bi-weeklies.

What is the highest power contact lens?

What is the strongest contact lens prescription? Contact lenses can be prescribed for extreme degrees of myopia, even for those who need correction of more than -20 Dioptres. Some lenses can go over -30 Dioptres. For monthly soft contact lenses, the highest level of corrective power is about -12 Dioptres.

Is it OK to wear contacts with dry eyes?

The patient will experience redness, dryness, or blurry vision. Contact lenses wrap around the eye, not letting it breathe as much as it should. Thus, it is often not a good idea to wear contact lenses while experiencing dry eyes. This is because there is an increased risk that the contact lens will scratch the cornea.

Which contact lenses are better daily or monthly?

Monthly contact lenses are thicker and more durable than daily lenses. That’s because they have to resist drying out while you store and use them for 30 days. When you aren’t wearing them, you can store the contact lenses in a small two-sided container with some contact solution.

What is silicone hydrogel used for?

Silicone hydrogels are the latest in a line of developments in soft lens material aimed at increasing the oxygen permeability (increased comfort, longer wear and better eye health), wettability (better comfort) and clinical performance of contact lenses.

Which Lotrafilcon is used for cataract surgery?

In the end of the surgery, the lotrafilcon B (Air Optix; Ciba Vision, Duluth, GA) was used in one eye and the comfilcon A (Biofinity; Coopervision, Fairport, NY) was used in the fellow eye randomly. Pain and discomfort were assessed on the first and third day after surgery by visual analogue scale.

Do Lotrafilcon B and Comfilcon A contact lenses reduce clinical symptoms after PRK?

The comfilcon A lens caused a more severe foreign body sensation only on the first day. There was no significant difference in photophobia, epiphora, and blurred vision between the two lenses (P>0.05). Conclusions: Both lotrafilcon B and comfilcon A silicone hydrogel bandage contact lenses reduce clinical symptoms after PRK effectively.

Which Lotrafilcon a CLs are the best for the eyes?

The Lotrafilcon A CLs, consisting of dimethylacrylamide (DMA) and siloxane showed the best results. At a concentration of 16% VE there was a 9.8-fold release time increase from the standard eye-drop treatment, while there was a 76-fold and a 341-fold release time increase respectively for a 27% and a 74% VE concentration.

What is the best way to wear Lotrafilcon B?

Lotrafilcon B contact lenses with EOBO-41 worn first, followed by lotrafilcon B contact lenses worn second. Both products worn bilaterally (in both eyes) for 30 days and removed nightly for care using a hydrogen peroxide-based lens care solution.